.bh-collapse {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    color: #000000d9;
    font-size: 14px;
    font-variant: tabular-nums;
    line-height: 1.5715;
    list-style: none;
    font-feature-settings: "tnum";
    background-color: #fafafa;
    border: 1px solid #d9d9d9;
    border-bottom: 0;
    border-radius: 2px;
}
.bh-collapse>.bh-collapse-item {
    border-bottom: 1px solid #d9d9d9;
}
.bh-collapse>.bh-collapse-item>.bh-collapse-header {
    display: flex;
    flex-wrap: nowrap;
    align-items: flex-start;
    padding: 12px 16px;
    color: #000000d9;
    line-height: 1.5715;
    cursor: pointer;
    transition: all .3s,visibility 0s;
}
.bh-collapse-content {
    display: none;
    color: #000000d9;
    background-color: #fff;
    border-top: 1px solid #d9d9d9;
}
.bh-collapse-content>.bh-collapse-content-box {
    padding: 16px;
}
.bh-collapse>.bh-collapse-item>.bh-collapse-header .bh-collapse-arrow {
    display: inline-block;
    margin-right: 12px;
    font-size: 12px;
    vertical-align: -1px;
    transition: transform .2s;
}
.bh-collapse-item.bh-collapse-item-active .bh-collapse-content {
    display: block;
}
.bh-collapse-item.bh-collapse-item-active .bh-collapse-arrow{
    transform: rotate(90deg);
}